Now showing items 37-56 of 68

    • Oil Spill Behavior and Response in the Arctic. Risk Analysis of Existing Response Methods Applicable for the Arctic Conditions 

      Zhelezniak, Viktoriia (Master thesis; Mastergradsoppgave, 2021-06-01)
      Due to the demand for diversifying and modifying sources of raw materials and trade routes, the Arctic is the region of high interests. Development and carrying out the offshore activities associated with oil and gas industry and maritime transport are growing rapidly in the Arctic. However, an acute problem associated with the development of offshore activities is the ecological consequence caused ...
    • Oil Spill Preparedness and Response in the Arctic. The effect of low temperature on oil spill response operations in the Arctic with respect to overall equipment effectiveness 

      Rolandsen, Markus Helfjord (Master thesis; Mastergradsoppgave, 2018-06-02)
      Effectiveness is an important term in oil spill response operations. Literature often relate to the level of effectiveness connected to either mechanical containment and recovery, in-situ burning or chemical dispersant application. The term effectiveness in oil spill response operations can be related to existing theory and the perspective of Overall Equipment Effectiveness (OEE). The perspective ...
    • Optimal Ordering Strategy of Perishable Products 

      Bjørvik, Simon Sagelv (Master thesis; Mastergradsoppgave, 2016-07-13)
      It is challenging to plan for the future, especially if there are uncertainties. In the retail store business making the right orders at the right time might have a severe impact on the profit of the store. Maintaining the right inventory is a part of this. With fluctuations in price and competition, having the best deals, and being at the whims of the customers making sure that the store has the ...
    • Optimization of maritime operations in Arctic. Rating of improvement of weather routing/decision support systems for maritime operations in the Arctic region 

      Johansen, Kåre (Master thesis; Mastergradsoppgave, 2013-05-15)
      Abstract The decreased ice extent caused by increased air and sea temperatures has led to a growing interest in the Arctic waters. There are different maritime industries that have plans to expand northwards for various reasons. First of all there are different developments in oil and gas industry in Barents, Kara, Greenland, Arctic sea around the coast of Canada and Alaska. New ship trading ...
    • Preventing Atmospheric Icing in Aviation: Passive Repulsion of Super Cooled Water Droplets through Hydrophobic Nanocomposites 

      Hobitz, Gøran Frantzen (Master thesis; Mastergradsoppgave, 2020-07-13)
      The aviation industry already consists of a complex system of strict regulations related to operation and maintenance, where severe weather conditions further challenge flight operations. Recent research has shown that most aircraft accidents are caused by icing externally, where severe icing conditions lead to the critical degradation of the aerodynamic effectiveness – increasing the stall speed. ...
    • Real time estimation of measurement in annular pressure and their relationship with pore and fracture pressure profile 

      Hassan, Syed Yasir (Master thesis; Mastergradsoppgave, 2016-06-01)
      The drilling industry still faces the challenge of acquiring accurate and viable precision of subsurface pressure data. To address this, drilling industry is keen to establish accurate and reliable measurement of pressure in wellbore and to estimate the pore pressure and fracture pressure profile with utmost precision. In any drilling operation, it is important to maintain the annulus pressure ...
    • Resilience assessment of the transport corridor from Stokmarknes to Stockholm 

      Ashrafi, Behrooz (Master thesis; Mastergradsoppgave, 2019-08-01)
      Timely delivery of the required goods plays an important role in meeting the availability and reducing the downtime of Markets. Salmon transport logistics is affected in complex ways while operating in the Arctic, since the area is sparsely populated and has insufficient infrastructure. It is also greatly affected by the distinctive operational environment of the region, such as cold temperature, ...
    • Resilience, Reliability, and Recoverability (3Rs) 

      Jheeta, Manjit Singh (Master thesis; Mastergradsoppgave, 2022-01-06)
      Recent natural and human-made disasters, mortgage derivatives crises, and the need for stable systems in different areas have renewed interest in the concept of resilience, especially as it relates to complex industrial systems with mechanical failures. This concept in the engineering systems (infrastructure) domain could be interpreted as the probability that system conditions exceed an irrevocable ...
    • Risk of Ship Collision in the Barents Sea in 2030 

      Balto, Jan Børre Hansen (Master thesis; Mastergradsoppgave, 2014-06-01)
      This thesis evaluates the risk of ship collisions in the Barents Sea in 2030 between three future scenarios; Minimum, Basis and Maximum Scenario. IWRAP Mk2 program is utilized to make the calculations. Automatic Identification System (AIS) data of 2013 is used to parameterize current traffic density, while the increased traffic in the different scenarios is derived from an analysis of multiple ...
    • Risk-Based Spare Part Planning. Uncertainties and Operational Conditions 

      Ayele, Yonas Zewdu (Master thesis; Mastergradsoppgave, 2013-03-20)
      Estimates which indicate a large share of the world’s undiscovered oil and gas resources is to be found in the Arctic areas and the increasing demand for energy are important reasons for the growing interest in the High North region. As the offshore industry expands into the High North, system failures associated with these projects is expected to increase significantly. Hence, the quest for ...
    • Roll motion on small traditional Norwegian fishing vessels 

      Kristiansen, Gøran (Master thesis; Mastergradsoppgave, 2021-08-09)
      Roll motion is one of the six degrees of freedom and is the most difficult to predict, as roll motion is extremely sensitive to the viscous effect and induced flow separation. The smaller fishing vessel fleet commonly operates in almost all weather conditions, and sometimes in remote areas with cold arctic water where rescue can be far away and difficult. The safety of fishers depends on the vessel's ...
    • Root Cause Analysis of fire in waste facilities: A case study of Tromsø municipality 

      Kargar, Marjan (Master thesis; Mastergradsoppgave, 2021-06-01)
      The amount of waste produced in Norway has been increased considerably in the past decades as a result of population and economic growth. Therefore, the role of waste management companies in society has become more important. One of the significant challenges in the waste facilities is the fire that occurs regularly and causes various problems for the waste management companies. Several causes can ...
    • Segmentation of Polar Mesospheric Summer Echoes using Fully Convolutional Network 

      Domben, Erik Seip (Master thesis; Mastergradsoppgave, 2023-04-26)
      Polar Mesospheric Summer Echoes (PMSE) are strong coherent radar echoes that occur in the 80 to 90 km altitude range of the mesosphere during the Arctic summer months. These echoes are of significant interest to the space physics community as they provide insight into changes that occur in the atmosphere. To better understand these changes, large datasets of PMSE echoes need to be analysed. In ...
    • Seismic Surveys in Ice-Covered Waters 

      Klavenes, Jørgen Sørensen (Master thesis; Mastergradsoppgave, 2013-06-03)
      The master’s thesis ‘Seismic surveys in ice-covered waters’ describes several methods within the maritime seismic industry to acquire data concerning the Earth’s strata. It is the objective of this thesis to present a viable solution enabling the seismic industry to perform surveys in ice influenced waters. The hardware conducted for conventional seismic surveys are introduced and explained. ...
    • Sikkerhetsvurdering av Tromsøysundtunnelen 

      Jensen, Sondre Finjord (Master thesis; Mastergradsoppgave, 2016-05-31)
      Veitunneler er statistisk sett en av de sikreste delene av veinettet, med svært få hendelser sammenlignet med det øvrige nettet. Det er derimot spesielle forhold som i vesentlig grad avviker fra veinettet for øvrig med tanke på brann og rømning. De ulike sikkerhetssystemene i tunnelen er med på å hindre at hendelser oppstår, og redusere konsekvensene hvis ulykken først er ute. Gjennom oppgaven ...
    • Simplified Representation of Degradation, Inspection and Maintenance in a Strategic Decision Support Tool for Offshore Wind Operation and Maintenance 

      Hussain, Azeem (Master thesis; Mastergradsoppgave, 2016-08-09)
      The global demand for energy is increasing in the current scenario of industrial development and offshore wind energy has a great potential to become a key player specifically in Europe’s renewable energy future. Naturally the flow of wind in offshore environments is more consistent and also the average wind velocity is higher than onshore. However, the cost of electricity generated from offshore ...
    • Simulation of Meteorological and Oceanographic Parameters: An Application in Spray Icing Prediction 

      Shojaei Barjouei, Abolfazl (Master thesis; Mastergradsoppgave, 2020-07-13)
      Sea spray icing is considered as a major environmental challenge in the Arctic Ocean, which poses a critical risk not only to the vessels and industrial operations but also to human safety. Although some studies have been carried out to estimate spray icing rate (e.g., RIGICE04 and ICEMOD models), such models suffer from some unrealistic modeling assumptions and limited verification. Moreover, limited ...
    • Snow detection on antenna radomes using signal processing 

      Fauske, Åse Nordahl (Master thesis; Mastergradsoppgave, 2022-06-25)
      Radomes are dome-shaped covers that protect the antenna from the climate, such as rain, wind, sunlight, and snow. Even though the radomes protect the antenna from snow and ice, it does not prevent snow and ice from building up on the radome. When snow and ice build up enough on the radome, the signal passing through it loses strength. This project tries to detect snow and ice build-up on antenna ...
    • Study of failure profiles in the bridge structures 

      Amiri, Razieh (Master thesis; Mastergradsoppgave, 2019-10-15)
      Bridge safety is an indispensable part of transportation safety. However, each bridge is unique with respect to its material, design and the environment which it is located in, and other relevant factors. This makes defining a unified framework for studying and categorizing failures in the bridges a difficult task. The current report aims at taking the first step to reach such a goal. This report ...
    • Study of Refrigerants for Heat Pumps in Colder Climate 

      Eriksen, Nils Eivind (Master thesis; Mastergradsoppgave, 2014-06-01)
      The aim for the thesis is to look at the performance of natural refrigerants in heat pumps while operating in a colder climate. The advantage of using natural refrigerants is that they have significantly lower global warming potential (GWP) in comparison to the synthetic refrigerants i.e. hydro fluorocarbons (HFC) and hydro chlorofluorocarbons (HCFC). Natural refrigerants are becoming common to use ...